Recent content by greg_mustang

Thanks for all the info. My question really was specific to vacuuming the condensor side of the mini-split, never had to do that, only linesets with evap. OK, as I understand it, there is nothing special/different to vacuuming the condensor side as compared to the evap side. Greg

Hi All, The refrigerant of a mini split will be pulled into a recovery bottle in order to do a brazing repair inside the outside unit. Once done, I will have to vacuum the entire unit and put back the refrigerant. So my question is regarding vacuuming the entire unit. Any risk oil will be...

Thanks but that didnt remotely answer my question. Anyone know if its relevant to use superheat to check the charge of a mini-split with orifice metering device? Greg

Nobody?

Hello, Looking for advice for checking charge level on a 410a mini-split. The unit is with an orifice metering/throtting device. I am confused on whether or not i can use a superheat measurement (vs. value off table comparing inside and outside temp). I once read that all these fixed metering...

Mini-split. The expansion/throttling is done at the exterior unit, not at the evaporator. When the refrigerant is low, the liquid line evaporates (if thats the correct term) too soon in the cycle, i.e. exactly at the output of the capillary, causing it to freeze up. As refrigerant is added, the...

Hi, Most split systems i have installed in my home have been with TXV. Recently I have had the 'pleasure' of installing a cheap unit that uses a capillary as the throttling device for refrigerant expansion. On this specific unit, I noticed that if the refrigerant is low, the output of the...

oh great thanks! Its not in my manual... I just figured it out in my case on another unit that had a blocked expansion device, suction went to negative, I closed the ports, and refrigerant was captured in condensor unit :)

Thanks. I did look into it, mine has no such function. I was wondering if anyone did it the way I said initially. I would like to try it, seems logical, cant see what can go wrong? Greg

Hi All. I have a question regarding mini-split installs. It appears that while compressor is running, in cooling mode, if you close off the discharge 3-way valve (stopping the liquid line from feeding the lineset), pressure monitored at that port (suction side) drops to zero or vacuum, then...